---
schema_version: "secwatch.filing_event.v1"
accession: "0001575872-23-000129"
form_type: "8-K"
ticker: "ESLA"
cik: "0001844417"
company_name: "Estrella Immunopharma, Inc."
filed_at: "2023-01-24T23:59:59+00:00"
generated_at: "2026-06-20T10:59:56.017574+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# TradeUP Acquisition extends business combination deadline to Feb 19, 2023; issues notes for extension expenses

## Summary
- Deposited $45,511 into trust to extend deadline from Jan 19 to Feb 19, 2023, funded by Estrella Biopharma.
- Issued unsecured $45,511 promissory note to Estrella for extension deposit; no interest, due at merger close.
- Issued $50,000 promissory note to sponsor TradeUP Acquisition Sponsor LLC for operating expenses, convertible at $10/share.
- Company may extend monthly until July 19, 2023 by depositing additional $45,511 each month.
- Notes convertible into common stock at $10 per share upon written notice two business days before merger close.

## SEC filing metadata
- accession: 0001575872-23-000129
- form_type: 8-K
- ticker: ESLA
- cik: 0001844417
- company_name: Estrella Immunopharma, Inc.
- filed_at: 2023-01-24T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 2.03, 3.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1844417/000157587223000129/0001575872-23-000129-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1844417/000157587223000129/uptd-20230131.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001575872-23-000129
- JSON: https://secwatch.observer/filing/0001575872-23-000129.json
- Plain text: https://secwatch.observer/filing/0001575872-23-000129.txt

## Key facts
- Debt Financings
  Estrella Immunopharma, Inc. incurred loan of $50,000 with TradeUP Acquisition Sponsor LLC at bear no interest maturing payable in full upon the consummation of the Company's business combination.
  - Instrument: loan
  - Principal: $50,000
  - Counterparty: TradeUP Acquisition Sponsor LLC
  - Rate: bear no interest
  - Maturity: payable in full upon the consummation of the Company's business combination
  - Event: incurrence
  source text: On January 19, 2023, the Company issued an unsecured promissory note (the “Sponsor Note”) in the amount of $50,000 to TradeUP Acquisition Sponsor LLC, one of its sponsors (the “Sponsor”) to evidence a deposit that the Sponsor provided to the Company to pay its certain operating expenses.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1844417/000157587223000129/0001575872-23-000129-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.